#define  _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#define NDEBUG
#include<assert.h>
int my_strlen(const char* p)
{
	int count = 0;
	assert(p);
	while (*p)
	{
		p++;
		count++;
	}
	return count;
}


int main()
{
	char arr[] = "abcdef";
	printf("%d",my_strlen(arr));
	return 0;
}